google / OpenSK

OpenSK is an open-source implementation for security keys written in Rust that supports both FIDO U2F and FIDO2 standards.

go-webauthn / webauthn

FIDO2 Conformant WebAuthn and Passkey backend library for golang

madeye / swpasskey

Software USB-HID FIDO2/CTAP2 authenticator daemon in C++23 (Linux UHID / macOS IOHIDUserDevice, TPM2 / Secure Enclave backed keys)